<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
</body>
</html>
<script>
    // var a = 10;
    // function a(){
    //     console.log(123);
        
    // }
    // var a = 10;
    // a();

</script>